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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Unless... posted by Rob Thomas on October 16, 2003 at 14:40:42:
that a spring system like the Vibraplane will pass and actually magnify vibration at frequencies lower than 1.4 times the resonant frequency of the spring. At 1.4 times the resonant frequency, the vibration is passed unchanged and at frequencies above 1.4 times the resonant frequency, the vibration is attenuated with the level of attenuation increasing as the frequency of the vibration increases.What that means is that we will get best isolation using a spring system by raising the frequency of the vibration we are trying to isolate our equipment from while at the same time lowering the resonant frequency of the spring. It also means that regardless of the resonant frequency of the spring system, a greater degree of isolation will be obtained as the frequency of the offending vibration is increased.
I would rather have a rack with a high resonant frequency than a low one. That ensures that isolation techniques will be more effective. On that basis, high mass supports placed below a spring system don't look like a good idea to me because the frequency at which the high mass support will vibrate will inevitably be lower than the frequency at which a low mass support vibrates.
My one exception to this is in relation to components designed and voiced on the assumption that they will be used on high mass supports. In that case a low mass support may not produce the sound the designer aimed for.
Hope this helps explain my position.
David Aiken
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- Theory says... - David Aiken 01:50:48 10/17/03 (0)
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